how can I draw a ellipse on a binary image using the elipse quadratic curve?

hello friends, i'm facing problem in drawing the ellipse on the binary image using the quadratic curve function. I have the values of A,B,C,D,E,F. In addition to this using the basic formulas we can calculate centre x,y along with semi-centre and angle of rotation. But how to draw it on the binary image or having a kind of matrix.

Answer 1

[Matt J]

One way:

hold on
fcontour(     @(x,y) A*x.^2+B*y.^2+C*x.*y+D*x+E*y+F    ,'LevelList',0);
hold off